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Ramlat as Sahmah 247
Basic information Name: Ramlat as Sahmah 247
     This is an OFFICIAL meteorite name.
Abbreviation: RaS 247
Observed fall: No
Year found: 2005
Country: Oman
Mass:help 579 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 531 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 1 Sep 2006
Writeuphelp
Writeup from MB 91:

Ramlat as Sahmah 247                                                20°18.685N, 56°13.519E

Oman

Find: 17 February 2005

Achondrite (ureilite)

History: S. Bartels, J. Bühler, B. Hofmann, I. Leya, and S. Lorenzetti recovered a single stone was during a systematic search for meteorites. A small fragment (0.16 g) of Fe-hydroxide with troilite inclusions found a few meters away and is probably derived from this meteorite as well.

Physical characteristics: Rounded, dark brown single stone with a mass of 579.0 g; no fusion crust preserved.

Petrography: (E. Gnos, UBE; B. Hofmann, NMBE; A. Al-Kathiri, UBE) The stone contains 16 vol% of 0.5– 1.8 mm size carbon plates consisting of graphite and diamond (confirmed by XRD). Carbon plates occur along grain boundaries of olivine (30 vol%) and pyroxene (54 vol%). The carbon plates show a preferred orientation parallel to the elongated silicate grains. Pyroxene grains are cloudy due to tiny inclusions and metal exsolution occurs in olivine at the contact with carbon, and along discrete zones within grains.

Mineral compositions and geochemistry: Mean compositions are olivine (Fa19.6) and pyroxene (Fs17.4Wo11.2). Reduced olivine grains near carbon plates reach composition of Fa1.0. Metal and troilite are partially oxidized.

Classification: Achondrite (ureilite); S2.

Type specimen: The meteorite is on deposit at NMBE.

Institutions
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
UBE: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Geography:

Oman
Coordinates:
     Recommended::   (20° 18' 41"N, 56° 13' 31"E)

Statistics:
     This is 1 of 1751 approved meteorites from Al Wusta, Oman (plus 72 unapproved names)
     This is 1 of 3960 approved meteorites from Oman (plus 371 unapproved names)
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